FI73116C - Planting machine planting head for plant cells. - Google Patents

Description

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FIELD OF THE INVENTION wherein the pit jaws are provided with an actuator for moving the jaws relative to the body between the closed pit position and the open trout drop position. Such a planting head is intended to function in a forest planting machine as a planting pit, trout introduction-15 and soil compaction member.

In previous machines for planting honeycombs, the planting pit is made by a wedge-shaped tip with one or two swivel-opening jaws. The ground is sealed around the cell after lifting the jaws. The jaws are attached to the nive-20 I in the implant tube, which must therefore also be lifted up before compaction. Sealing is performed by mechanical seals controlled by the sliding surfaces.

The cell type used is usually in the shape of a truncated pyramid or cone. It is planted with the narrower head down. 25 Using swivel-opening jaws, the planting pit has to be made equally wide at the lower and upper ends. This creates an air gap between the lower end of the cell and the ground at the side edges, which impairs the growth potential of the trout. The air gap is also increased by the material thicknesses of the jaws because the edges of the planting-30 pit are vertical. Compaction becomes more difficult as the air gap increases. During jaw uplift, the seedling is free in the planting pit and can often tilt or fall before the soil is compacted. The wedge-shaped tip of the planting tube most often penetrates well into the planting depth, but in some cases the soil is so hard, e.g. there are rocks around it, that the jaws cannot open.

2 731 1 6 Consequently, the planting will not be carried out, even if the in place the seedling would have growth potential.

The object of the present invention is to provide a planting head which eliminates the above-mentioned drawbacks. This object 5 is achieved by a planting head according to the invention, characterized in that the jaw plates are mounted on a frame to move vertically relative to the frame between a lowered, wedge-closed pit position and a raised, open seedling release position in the plane of the jaw plates.

The invention is based on the idea that the pit jaws are made such that even if they open to allow the jaw to fall into the planting pit formed by the jaws, the jaw opening movement no longer moves any ground at the pit, nor does it require the planting tube or other parts of the planting head to be raised. with the jaws.

In the new planting head, the planting pit is made by a wedge formed of two curved bent plates, which is open on 20 sides. The jaws rise up after making the pit along the edges of the pit, and thus no longer have to move the ground. From the open edges of the wedge, the sealing flaps pivot from top to bottom and press the cell tightly into the pit from the edges of the cell and hold the cell securely in place and upright during lifting of the jaws and seal the ground. During lifting of the jaws and use of the sealing flaps, the rest of the planting head is in place. With the jaws up, press the entire planting head down for a short moment to provide a collar-like seal around the trout. In addition to the sealing flaps, the Tii-30 is operated by sensors.

The planting head according to the invention has the following advantages: The planting head makes a honeycomb-shaped pit on two sides. No air gap is left on these pages. The material strength of the jaws is irrelevant because the planting well narrows downwards.

73116 - The seedling can be planted in harder soil and at tighter gaps, as there is no need to spread the jaws to the side.

- The seedling cannot fall or remain tilted.

5 - The rising jaws do not compress the ground hard at the edges of the planting pit.

- As the jaws rise, the sealing flaps hold the seedling element in the pit and at the same time press it tightly into the pit.

The invention will be described in more detail below with reference to the accompanying drawings, in which Figures 1 and 2 show a side view of a preferred embodiment of a planting head according to the invention in two different directions, Figures 3-6 schematically show the operating principle of a planting head 15 and Figures 7 and 8 show another embodiment. seen from two different sides.

The planting head shown in Figures 1 and 2 comprises a hollow, rectangular body 1 for attachment at its upper end to a carriage or the like sliding along a horizontal support bar supported by a towing vehicle not shown so that the body can be moved vertically by actuators not shown. At the same time, the frame forms a planting tube for the seedling cell 2 to be planted.

At the lower end of the body, two vertically curved jaw plates 3 are slidably mounted on guides 4 on opposite sides of the body. The jaw plates are connected at their upper ends to transfer rods 5 attached to a slide 6, 30 which in turn is attached to a pressure-bearing cylinder 7 supported by the body.

In addition, sealing flaps 9 are mounted at the lower end of the body about pivotable horizontal joints 8, which are connected to pressure medium cylinders 10 supported by the body.

Attached to opposite sides of the frame are also sensing legs 11 connected to detectors 12 which register the vertical movements of the sensing legs.

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In addition, rod-shaped cell guides 13 are mounted inside the planting tube formed by the body, which can be moved vertically by actuators (not shown).

5 The planting head works as follows:

At the beginning of planting, the seedling cell 2 is between the jaw plates 3. The body 1 is pushed downwards so that the downwardly tapering wedge formed by the jaw plates penetrates the ground until a detector connected to the tactile legs gives an impulse as a sign 10 of the planting depth reached (Fig. 3). This impulse stops the downwardly pressing actuators of the trunk and gives the cylinders 10 of the sealing flaps an impulse to turn the flaps 9 inwards into the gaps between the jaw plates to press the seedling element and the ground around it. At the same time, the cylinders 15 7 of the jaw plates receive an impulse to pull the jaw plates 3 upwards (Fig. 4). When the jaws are up, the body is pushed downward so that the sealing flaps and feelers provide a collar-like seal (Fig. 5). The frame is then raised, the jaws lowered, the sealing flaps turned to the initial position and the seedling cell dropped between the jaws (Fig. 6). The cell guides keep the trout upright, although there will be several planting attempts before a suitable planting site is found.

The planting head can also be provided with four jaws 23 which can be raised and lowered parallel to the planes of the plates, i.e. the sides of the formed planting pit. In other respects, the planting head functions in the same way as the embodiment described above.

The drawings and the accompanying description are intended only to illustrate the idea of the invention. The details of the planting head according to the invention can vary considerably within the scope of the claims.

Claims (5)

5,731,116 Claims: A planting head for a seedling cell planting machine, the planting head comprising a vertical body (1), 5 pit jaws movably mounted at the lower end of the body, located on opposite sides of the seedling drop point and comprising at least two downwardly approaching jaw plates (3; 23); ), wherein the pit jaws are provided with a drive member (5, 6, 7) for moving the jaws relative to the body between the closed pit position and the open trout drop position, characterized in that the jaw plates (3; 23) are mounted on the body (1) to move vertically between the lowered, wedge-closed pit position and the raised, open trout release position in the plane 15 of the jaw plates. Planting head according to Claim 1, with two pit jaws, characterized in that the jaw plates (3) are vertically curved and form two opposite wedge-shaped slots between them in the pit-laying position. Planting head according to Claim 2, characterized in that the plunger comprises two sealing flaps 25 (9) mounted on opposite sides of the trout drop point, which are mounted on the frame (1) to move between the sealing position projecting into the slots of the jaw plates (3) and the standby positions. Planting head according to one of the preceding claims, characterized in that the jaw plates (3) are attached at their upper ends to a drive element (5, 6, 7) which moves them vertically and are supported on guides (4) supported by the body (1). Planting head according to Claim 3, characterized in that the sealing flaps (9) are adapted in the sealing position to press against the upper edges of the seedling cell (2) between the jaw plates (3) and remain in the sealing position during lifting of the jaw plates. 73116